Observation chair



FIG. 1 is an isometric view of an embodiment of the design;

FIG. 2 is a right elevation view of the embodiment of FIG. 1;

FIG. 3 is a left elevation view of the embodiment of FIG. 1;

FIG. 4 is a front elevation view of the embodiment of FIG. 1;

FIG. 5 is a rear elevation view of the embodiment of FIG. 1;

FIG. 6 is a top view of the embodiment of FIG. 1;

FIG. 7 is a bottom view of the embodiment of FIG. 1;

FIG. 8 is an isometric view of another embodiment of the design;

FIG. 9 is a right elevation view of the embodiment of FIG. 8;

FIG. 10 is a left elevation view of the embodiment of FIG. 8;

FIG. 11 is a front elevation view of the embodiment of FIG. 8;

FIG. 12 is a rear elevation view of the embodiment of FIG. 8;

FIG. 13 is a top view of the embodiment of FIG. 8; and,

FIG. 14 is a bottom view of the embodiment of FIG. 8.

The broken lines in the drawings are included for the purpose of illustration and form no part of the claimed design. 

The ornamental design for an observation chair, as shown and described. 